// If this object gets passed to an error constructor the error will
// get an accessor for .message that constructs a descriptive error
// message on access.
-var kAddMessageAccessorsMarker = { };
+const kAddMessageAccessorsMarker = { };
-var kMessages = 0;
-
-var kReplacementMarkers = [ "%0", "%1", "%2", "%3" ];
+// This will be lazily initialized when first needed (and forcibly
+// overwritten even though it's const).
+const kMessages = 0;
function FormatString(format, message) {
var args = %MessageGetArguments(message);
var arg_num = 0;
for (var i = 0; i < format.length; i++) {
var str = format[i];
- for (arg_num = 0; arg_num < kReplacementMarkers.length; arg_num++) {
- if (str == kReplacementMarkers[arg_num]) {
+ if (str.length == 2 && %_StringCharCodeAt(str, 0) == 0x25) {
+ // Two-char string starts with "%".
+ var arg_num = (%_StringCharCodeAt(str, 1) - 0x30) >>> 0;
+ if (arg_num < 4) {
+ // str is one of %0, %1, %2 or %3.
try {
str = ToDetailString(args[arg_num]);
} catch (e) {
str = "#<error>";
}
- break;
}
}
result += str;
function ToDetailString(obj) {
- if (obj != null && IS_OBJECT(obj) &&
- obj.toString === $Object.prototype.toString) {
+ if (obj != null && IS_OBJECT(obj) && obj.toString === ObjectToString) {
var constructor = obj.constructor;
- if (!constructor) return ToStringCheckErrorObject(obj);
- var constructorName = constructor.name;
- if (!constructorName || !IS_STRING(constructorName)) {
- return ToStringCheckErrorObject(obj);
+ if (typeof constructor == "function") {
+ var constructorName = constructor.name;
+ if (IS_STRING(constructorName) && constructorName !== "") {
+ return "#<" + constructorName + ">";
+ }
}
- return "#<" + constructorName + ">";
- } else {
- return ToStringCheckErrorObject(obj);
}
+ return ToStringCheckErrorObject(obj);
}
// Helper functions; called from the runtime system.
function FormatMessage(message) {
if (kMessages === 0) {
- kMessages = {
+ var messagesDictionary = [
// Error
- cyclic_proto: ["Cyclic __proto__ value"],
- code_gen_from_strings: ["Code generation from strings disallowed for this context"],
+ "cyclic_proto", ["Cyclic __proto__ value"],
+ "code_gen_from_strings", ["Code generation from strings disallowed for this context"],
// TypeError
- unexpected_token: ["Unexpected token ", "%0"],
- unexpected_token_number: ["Unexpected number"],
- unexpected_token_string: ["Unexpected string"],
- unexpected_token_identifier: ["Unexpected identifier"],
- unexpected_reserved: ["Unexpected reserved word"],
- unexpected_strict_reserved: ["Unexpected strict mode reserved word"],
- unexpected_eos: ["Unexpected end of input"],
- malformed_regexp: ["Invalid regular expression: /", "%0", "/: ", "%1"],
- unterminated_regexp: ["Invalid regular expression: missing /"],
- regexp_flags: ["Cannot supply flags when constructing one RegExp from another"],
- incompatible_method_receiver: ["Method ", "%0", " called on incompatible receiver ", "%1"],
- invalid_lhs_in_assignment: ["Invalid left-hand side in assignment"],
- invalid_lhs_in_for_in: ["Invalid left-hand side in for-in"],
- invalid_lhs_in_postfix_op: ["Invalid left-hand side expression in postfix operation"],
- invalid_lhs_in_prefix_op: ["Invalid left-hand side expression in prefix operation"],
- multiple_defaults_in_switch: ["More than one default clause in switch statement"],
- newline_after_throw: ["Illegal newline after throw"],
- redeclaration: ["%0", " '", "%1", "' has already been declared"],
- no_catch_or_finally: ["Missing catch or finally after try"],
- unknown_label: ["Undefined label '", "%0", "'"],
- uncaught_exception: ["Uncaught ", "%0"],
- stack_trace: ["Stack Trace:\n", "%0"],
- called_non_callable: ["%0", " is not a function"],
- undefined_method: ["Object ", "%1", " has no method '", "%0", "'"],
- property_not_function: ["Property '", "%0", "' of object ", "%1", " is not a function"],
- cannot_convert_to_primitive: ["Cannot convert object to primitive value"],
- not_constructor: ["%0", " is not a constructor"],
- not_defined: ["%0", " is not defined"],
- non_object_property_load: ["Cannot read property '", "%0", "' of ", "%1"],
- non_object_property_store: ["Cannot set property '", "%0", "' of ", "%1"],
- non_object_property_call: ["Cannot call method '", "%0", "' of ", "%1"],
- with_expression: ["%0", " has no properties"],
- illegal_invocation: ["Illegal invocation"],
- no_setter_in_callback: ["Cannot set property ", "%0", " of ", "%1", " which has only a getter"],
- apply_non_function: ["Function.prototype.apply was called on ", "%0", ", which is a ", "%1", " and not a function"],
- apply_wrong_args: ["Function.prototype.apply: Arguments list has wrong type"],
- invalid_in_operator_use: ["Cannot use 'in' operator to search for '", "%0", "' in ", "%1"],
- instanceof_function_expected: ["Expecting a function in instanceof check, but got ", "%0"],
- instanceof_nonobject_proto: ["Function has non-object prototype '", "%0", "' in instanceof check"],
- null_to_object: ["Cannot convert null to object"],
- reduce_no_initial: ["Reduce of empty array with no initial value"],
- getter_must_be_callable: ["Getter must be a function: ", "%0"],
- setter_must_be_callable: ["Setter must be a function: ", "%0"],
- value_and_accessor: ["Invalid property. A property cannot both have accessors and be writable or have a value: ", "%0"],
- proto_object_or_null: ["Object prototype may only be an Object or null"],
- property_desc_object: ["Property description must be an object: ", "%0"],
- redefine_disallowed: ["Cannot redefine property: ", "%0"],
- define_disallowed: ["Cannot define property:", "%0", ", object is not extensible."],
- non_extensible_proto: ["%0", " is not extensible"],
- handler_non_object: ["Proxy.", "%0", " called with non-object as handler"],
- handler_trap_missing: ["Proxy handler ", "%0", " has no '", "%1", "' trap"],
- handler_trap_must_be_callable: ["Proxy handler ", "%0", " has non-callable '", "%1", "' trap"],
- handler_returned_false: ["Proxy handler ", "%0", " returned false for '", "%1", "' trap"],
- handler_returned_undefined: ["Proxy handler ", "%0", " returned undefined for '", "%1", "' trap"],
- proxy_prop_not_configurable: ["Trap ", "%1", " of proxy handler ", "%0", " returned non-configurable descriptor for property ", "%2"],
- proxy_non_object_prop_names: ["Trap ", "%1", " returned non-object ", "%0"],
- proxy_repeated_prop_name: ["Trap ", "%1", " returned repeated property name ", "%2"],
- invalid_weakmap_key: ["Invalid value used as weak map key"],
+ "unexpected_token", ["Unexpected token ", "%0"],
+ "unexpected_token_number", ["Unexpected number"],
+ "unexpected_token_string", ["Unexpected string"],
+ "unexpected_token_identifier", ["Unexpected identifier"],
+ "unexpected_reserved", ["Unexpected reserved word"],
+ "unexpected_strict_reserved", ["Unexpected strict mode reserved word"],
+ "unexpected_eos", ["Unexpected end of input"],
+ "malformed_regexp", ["Invalid regular expression: /", "%0", "/: ", "%1"],
+ "unterminated_regexp", ["Invalid regular expression: missing /"],
+ "regexp_flags", ["Cannot supply flags when constructing one RegExp from another"],
+ "incompatible_method_receiver", ["Method ", "%0", " called on incompatible receiver ", "%1"],
+ "invalid_lhs_in_assignment", ["Invalid left-hand side in assignment"],
+ "invalid_lhs_in_for_in", ["Invalid left-hand side in for-in"],
+ "invalid_lhs_in_postfix_op", ["Invalid left-hand side expression in postfix operation"],
+ "invalid_lhs_in_prefix_op", ["Invalid left-hand side expression in prefix operation"],
+ "multiple_defaults_in_switch", ["More than one default clause in switch statement"],
+ "newline_after_throw", ["Illegal newline after throw"],
+ "redeclaration", ["%0", " '", "%1", "' has already been declared"],
+ "no_catch_or_finally", ["Missing catch or finally after try"],
+ "unknown_label", ["Undefined label '", "%0", "'"],
+ "uncaught_exception", ["Uncaught ", "%0"],
+ "stack_trace", ["Stack Trace:\n", "%0"],
+ "called_non_callable", ["%0", " is not a function"],
+ "undefined_method", ["Object ", "%1", " has no method '", "%0", "'"],
+ "property_not_function", ["Property '", "%0", "' of object ", "%1", " is not a function"],
+ "cannot_convert_to_primitive", ["Cannot convert object to primitive value"],
+ "not_constructor", ["%0", " is not a constructor"],
+ "not_defined", ["%0", " is not defined"],
+ "non_object_property_load", ["Cannot read property '", "%0", "' of ", "%1"],
+ "non_object_property_store", ["Cannot set property '", "%0", "' of ", "%1"],
+ "non_object_property_call", ["Cannot call method '", "%0", "' of ", "%1"],
+ "with_expression", ["%0", " has no properties"],
+ "illegal_invocation", ["Illegal invocation"],
+ "no_setter_in_callback", ["Cannot set property ", "%0", " of ", "%1", " which has only a getter"],
+ "apply_non_function", ["Function.prototype.apply was called on ", "%0", ", which is a ", "%1", " and not a function"],
+ "apply_wrong_args", ["Function.prototype.apply: Arguments list has wrong type"],
+ "invalid_in_operator_use", ["Cannot use 'in' operator to search for '", "%0", "' in ", "%1"],
+ "instanceof_function_expected", ["Expecting a function in instanceof check, but got ", "%0"],
+ "instanceof_nonobject_proto", ["Function has non-object prototype '", "%0", "' in instanceof check"],
+ "null_to_object", ["Cannot convert null to object"],
+ "reduce_no_initial", ["Reduce of empty array with no initial value"],
+ "getter_must_be_callable", ["Getter must be a function: ", "%0"],
+ "setter_must_be_callable", ["Setter must be a function: ", "%0"],
+ "value_and_accessor", ["Invalid property. A property cannot both have accessors and be writable or have a value, ", "%0"],
+ "proto_object_or_null", ["Object prototype may only be an Object or null"],
+ "property_desc_object", ["Property description must be an object: ", "%0"],
+ "redefine_disallowed", ["Cannot redefine property: ", "%0"],
+ "define_disallowed", ["Cannot define property:", "%0", ", object is not extensible."],
+ "non_extensible_proto", ["%0", " is not extensible"],
+ "handler_non_object", ["Proxy.", "%0", " called with non-object as handler"],
+ "handler_trap_missing", ["Proxy handler ", "%0", " has no '", "%1", "' trap"],
+ "handler_trap_must_be_callable", ["Proxy handler ", "%0", " has non-callable '", "%1", "' trap"],
+ "handler_returned_false", ["Proxy handler ", "%0", " returned false for '", "%1", "' trap"],
+ "handler_returned_undefined", ["Proxy handler ", "%0", " returned undefined for '", "%1", "' trap"],
+ "proxy_prop_not_configurable", ["Trap ", "%1", " of proxy handler ", "%0", " returned non-configurable descriptor for property ", "%2"],
+ "proxy_non_object_prop_names", ["Trap ", "%1", " returned non-object ", "%0"],
+ "proxy_repeated_prop_name", ["Trap ", "%1", " returned repeated property name ", "%2"],
+ "invalid_weakmap_key", ["Invalid value used as weak map key"],
// RangeError
- invalid_array_length: ["Invalid array length"],
- stack_overflow: ["Maximum call stack size exceeded"],
+ "invalid_array_length", ["Invalid array length"],
+ "stack_overflow", ["Maximum call stack size exceeded"],
// SyntaxError
- unable_to_parse: ["Parse error"],
- invalid_regexp_flags: ["Invalid flags supplied to RegExp constructor '", "%0", "'"],
- invalid_regexp: ["Invalid RegExp pattern /", "%0", "/"],
- illegal_break: ["Illegal break statement"],
- illegal_continue: ["Illegal continue statement"],
- illegal_return: ["Illegal return statement"],
- error_loading_debugger: ["Error loading debugger"],
- no_input_to_regexp: ["No input to ", "%0"],
- invalid_json: ["String '", "%0", "' is not valid JSON"],
- circular_structure: ["Converting circular structure to JSON"],
- obj_ctor_property_non_object: ["Object.", "%0", " called on non-object"],
- called_on_null_or_undefined: ["%0", " called on null or undefined"],
- array_indexof_not_defined: ["Array.getIndexOf: Argument undefined"],
- object_not_extensible: ["Can't add property ", "%0", ", object is not extensible"],
- illegal_access: ["Illegal access"],
- invalid_preparser_data: ["Invalid preparser data for function ", "%0"],
- strict_mode_with: ["Strict mode code may not include a with statement"],
- strict_catch_variable: ["Catch variable may not be eval or arguments in strict mode"],
- too_many_arguments: ["Too many arguments in function call (only 32766 allowed)"],
- too_many_parameters: ["Too many parameters in function definition (only 32766 allowed)"],
- too_many_variables: ["Too many variables declared (only 32767 allowed)"],
- strict_param_name: ["Parameter name eval or arguments is not allowed in strict mode"],
- strict_param_dupe: ["Strict mode function may not have duplicate parameter names"],
- strict_var_name: ["Variable name may not be eval or arguments in strict mode"],
- strict_function_name: ["Function name may not be eval or arguments in strict mode"],
- strict_octal_literal: ["Octal literals are not allowed in strict mode."],
- strict_duplicate_property: ["Duplicate data property in object literal not allowed in strict mode"],
- accessor_data_property: ["Object literal may not have data and accessor property with the same name"],
- accessor_get_set: ["Object literal may not have multiple get/set accessors with the same name"],
- strict_lhs_assignment: ["Assignment to eval or arguments is not allowed in strict mode"],
- strict_lhs_postfix: ["Postfix increment/decrement may not have eval or arguments operand in strict mode"],
- strict_lhs_prefix: ["Prefix increment/decrement may not have eval or arguments operand in strict mode"],
- strict_reserved_word: ["Use of future reserved word in strict mode"],
- strict_delete: ["Delete of an unqualified identifier in strict mode."],
- strict_delete_property: ["Cannot delete property '", "%0", "' of ", "%1"],
- strict_const: ["Use of const in strict mode."],
- strict_function: ["In strict mode code, functions can only be declared at top level or immediately within another function." ],
- strict_read_only_property: ["Cannot assign to read only property '", "%0", "' of ", "%1"],
- strict_cannot_assign: ["Cannot assign to read only '", "%0", "' in strict mode"],
- strict_poison_pill: ["'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them"],
- strict_caller: ["Illegal access to a strict mode caller function."],
- unprotected_let: ["Illegal let declaration in unprotected statement context."],
- };
+ "unable_to_parse", ["Parse error"],
+ "invalid_regexp_flags", ["Invalid flags supplied to RegExp constructor '", "%0", "'"],
+ "invalid_regexp", ["Invalid RegExp pattern /", "%0", "/"],
+ "illegal_break", ["Illegal break statement"],
+ "illegal_continue", ["Illegal continue statement"],
+ "illegal_return", ["Illegal return statement"],
+ "error_loading_debugger", ["Error loading debugger"],
+ "no_input_to_regexp", ["No input to ", "%0"],
+ "invalid_json", ["String '", "%0", "' is not valid JSON"],
+ "circular_structure", ["Converting circular structure to JSON"],
+ "obj_ctor_property_non_object", ["Object.", "%0", " called on non-object"],
+ "called_on_null_or_undefined", ["%0", " called on null or undefined"],
+ "array_indexof_not_defined", ["Array.getIndexOf: Argument undefined"],
+ "object_not_extensible", ["Can't add property ", "%0", ", object is not extensible"],
+ "illegal_access", ["Illegal access"],
+ "invalid_preparser_data", ["Invalid preparser data for function ", "%0"],
+ "strict_mode_with", ["Strict mode code may not include a with statement"],
+ "strict_catch_variable", ["Catch variable may not be eval or arguments in strict mode"],
+ "too_many_arguments", ["Too many arguments in function call (only 32766 allowed)"],
+ "too_many_parameters", ["Too many parameters in function definition (only 32766 allowed)"],
+ "too_many_variables", ["Too many variables declared (only 32767 allowed)"],
+ "strict_param_name", ["Parameter name eval or arguments is not allowed in strict mode"],
+ "strict_param_dupe", ["Strict mode function may not have duplicate parameter names"],
+ "strict_var_name", ["Variable name may not be eval or arguments in strict mode"],
+ "strict_function_name", ["Function name may not be eval or arguments in strict mode"],
+ "strict_octal_literal", ["Octal literals are not allowed in strict mode."],
+ "strict_duplicate_property", ["Duplicate data property in object literal not allowed in strict mode"],
+ "accessor_data_property", ["Object literal may not have data and accessor property with the same name"],
+ "accessor_get_set", ["Object literal may not have multiple get/set accessors with the same name"],
+ "strict_lhs_assignment", ["Assignment to eval or arguments is not allowed in strict mode"],
+ "strict_lhs_postfix", ["Postfix increment/decrement may not have eval or arguments operand in strict mode"],
+ "strict_lhs_prefix", ["Prefix increment/decrement may not have eval or arguments operand in strict mode"],
+ "strict_reserved_word", ["Use of future reserved word in strict mode"],
+ "strict_delete", ["Delete of an unqualified identifier in strict mode."],
+ "strict_delete_property", ["Cannot delete property '", "%0", "' of ", "%1"],
+ "strict_const", ["Use of const in strict mode."],
+ "strict_function", ["In strict mode code, functions can only be declared at top level or immediately within another function." ],
+ "strict_read_only_property", ["Cannot assign to read only property '", "%0", "' of ", "%1"],
+ "strict_cannot_assign", ["Cannot assign to read only '", "%0", "' in strict mode"],
+ "strict_poison_pill", ["'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them"],
+ "strict_caller", ["Illegal access to a strict mode caller function."],
+ "unprotected_let", ["Illegal let declaration in unprotected statement context."],
+ ];
+ var messages = { __proto__ : null };
+ var desc = new PropertyDescriptor();
+ desc.setConfigurable(false);
+ desc.setEnumerable(false);
+ desc.setWritable(false);
+ for (var i = 0; i < messagesDictionary.length; i += 2) {
+ var key = messagesDictionary[i];
+ var format = messagesDictionary[i + 1];
+ ObjectFreeze(format);
+ desc.setValue(format);
+ DefineOwnProperty(messages, key, desc);
+ }
+ %PreventExtensions(messages);
+ %IgnoreAttributesAndSetProperty(builtins, "kMessages",
+ messages,
+ DONT_DELETE | DONT_ENUM | READ_ONLY);
}
var message_type = %MessageGetType(message);
var format = kMessages[message_type];
}
}
-function DefineError(f) {
- // Store the error function in both the global object
- // and the runtime object. The function is fetched
- // from the runtime object when throwing errors from
- // within the runtime system to avoid strange side
- // effects when overwriting the error functions from
- // user code.
- var name = f.name;
- %SetProperty(global, name, f, DONT_ENUM);
- this['$' + name] = f;
- // Configure the error function.
- if (name == 'Error') {
- // The prototype of the Error object must itself be an error.
- // However, it can't be an instance of the Error object because
- // it hasn't been properly configured yet. Instead we create a
- // special not-a-true-error-but-close-enough object.
- function ErrorPrototype() {}
- %FunctionSetPrototype(ErrorPrototype, $Object.prototype);
- %FunctionSetInstanceClassName(ErrorPrototype, 'Error');
- %FunctionSetPrototype(f, new ErrorPrototype());
- } else {
- %FunctionSetPrototype(f, new $Error());
- }
- %FunctionSetInstanceClassName(f, 'Error');
- %SetProperty(f.prototype, 'constructor', f, DONT_ENUM);
- // The name property on the prototype of error objects is not
- // specified as being read-one and dont-delete. However, allowing
- // overwriting allows leaks of error objects between script blocks
- // in the same context in a browser setting. Therefore we fix the
- // name.
- %SetProperty(f.prototype, "name", name, DONT_ENUM | DONT_DELETE | READ_ONLY);
- %SetCode(f, function(m) {
- if (%_IsConstructCall()) {
- // Define all the expected properties directly on the error
- // object. This avoids going through getters and setters defined
- // on prototype objects.
- %IgnoreAttributesAndSetProperty(this, 'stack', void 0, DONT_ENUM);
- %IgnoreAttributesAndSetProperty(this, 'arguments', void 0, DONT_ENUM);
- %IgnoreAttributesAndSetProperty(this, 'type', void 0, DONT_ENUM);
- if (m === kAddMessageAccessorsMarker) {
- // DefineOneShotAccessor always inserts a message property and
- // ignores setters.
- DefineOneShotAccessor(this, 'message', function (obj) {
- return FormatMessage(%NewMessageObject(obj.type, obj.arguments));
- });
- } else if (!IS_UNDEFINED(m)) {
- %IgnoreAttributesAndSetProperty(this,
- 'message',
- ToString(m),
- DONT_ENUM);
- }
- captureStackTrace(this, f);
- } else {
- return new f(m);
- }
- });
-}
-
function captureStackTrace(obj, cons_opt) {
var stackTraceLimit = $Error.stackTraceLimit;
if (!stackTraceLimit || !IS_NUMBER(stackTraceLimit)) return;
});
};
-$Math.__proto__ = global.Object.prototype;
-
-// DefineError is a native function. Use explicit receiver. Otherwise
-// the receiver will be 'undefined'.
-this.DefineError(function Error() { });
-this.DefineError(function TypeError() { });
-this.DefineError(function RangeError() { });
-this.DefineError(function SyntaxError() { });
-this.DefineError(function ReferenceError() { });
-this.DefineError(function EvalError() { });
-this.DefineError(function URIError() { });
-$Error.captureStackTrace = captureStackTrace;
+(function () {
+ // Define special error type constructors.
+
+ function DefineError(f) {
+ // Store the error function in both the global object
+ // and the runtime object. The function is fetched
+ // from the runtime object when throwing errors from
+ // within the runtime system to avoid strange side
+ // effects when overwriting the error functions from
+ // user code.
+ var name = f.name;
+ %SetProperty(global, name, f, DONT_ENUM);
+ builtins['$' + name] = f;
+ // Configure the error function.
+ if (name == 'Error') {
+ // The prototype of the Error object must itself be an error.
+ // However, it can't be an instance of the Error object because
+ // it hasn't been properly configured yet. Instead we create a
+ // special not-a-true-error-but-close-enough object.
+ function ErrorPrototype() {}
+ %FunctionSetPrototype(ErrorPrototype, $Object.prototype);
+ %FunctionSetInstanceClassName(ErrorPrototype, 'Error');
+ %FunctionSetPrototype(f, new ErrorPrototype());
+ } else {
+ %FunctionSetPrototype(f, new $Error());
+ }
+ %FunctionSetInstanceClassName(f, 'Error');
+ %SetProperty(f.prototype, 'constructor', f, DONT_ENUM);
+ // The name property on the prototype of error objects is not
+ // specified as being read-one and dont-delete. However, allowing
+ // overwriting allows leaks of error objects between script blocks
+ // in the same context in a browser setting. Therefore we fix the
+ // name.
+ %SetProperty(f.prototype, "name", name,
+ DONT_ENUM | DONT_DELETE | READ_ONLY) ;
+ %SetCode(f, function(m) {
+ if (%_IsConstructCall()) {
+ // Define all the expected properties directly on the error
+ // object. This avoids going through getters and setters defined
+ // on prototype objects.
+ %IgnoreAttributesAndSetProperty(this, 'stack', void 0, DONT_ENUM);
+ %IgnoreAttributesAndSetProperty(this, 'arguments', void 0, DONT_ENUM);
+ %IgnoreAttributesAndSetProperty(this, 'type', void 0, DONT_ENUM);
+ if (m === kAddMessageAccessorsMarker) {
+ // DefineOneShotAccessor always inserts a message property and
+ // ignores setters.
+ DefineOneShotAccessor(this, 'message', function (obj) {
+ return FormatMessage(%NewMessageObject(obj.type, obj.arguments));
+ });
+ } else if (!IS_UNDEFINED(m)) {
+ %IgnoreAttributesAndSetProperty(this,
+ 'message',
+ ToString(m),
+ DONT_ENUM);
+ }
+ captureStackTrace(this, f);
+ } else {
+ return new f(m);
+ }
+ });
+ }
-// Setup extra properties of the Error.prototype object.
-function setErrorMessage() {
- var desc = {value: '',
- enumerable: false,
- configurable: true,
- writable: true };
- DefineOwnProperty($Error.prototype,
- 'message',
- ToPropertyDescriptor(desc),
- true);
+ DefineError(function Error() { });
+ DefineError(function TypeError() { });
+ DefineError(function RangeError() { });
+ DefineError(function SyntaxError() { });
+ DefineError(function ReferenceError() { });
+ DefineError(function EvalError() { });
+ DefineError(function URIError() { });
+})();
-}
+$Error.captureStackTrace = captureStackTrace;
-setErrorMessage();
+%SetProperty($Error.prototype, 'message', '', DONT_ENUM);
// Global list of error objects visited during errorToString. This is
// used to detect cycles in error toString formatting.
-var visited_errors = new $Array();
-var cyclic_error_marker = new $Object();
+const visited_errors = new InternalArray();
+const cyclic_error_marker = new $Object();
-function errorToStringDetectCycle() {
- if (!%PushIfAbsent(visited_errors, this)) throw cyclic_error_marker;
+function errorToStringDetectCycle(error) {
+ if (!%PushIfAbsent(visited_errors, error)) throw cyclic_error_marker;
try {
- var type = this.type;
- if (type && !%_CallFunction(this, "message", ObjectHasOwnProperty)) {
- var formatted = FormatMessage(%NewMessageObject(type, this.arguments));
- return this.name + ": " + formatted;
+ var type = error.type;
+ var hasMessage = %_CallFunction(error, "message", ObjectHasOwnProperty);
+ if (type && !hasMessage) {
+ var formatted = FormatMessage(%NewMessageObject(type, error.arguments));
+ return error.name + ": " + formatted;
}
- var message = %_CallFunction(this, "message", ObjectHasOwnProperty)
- ? (": " + this.message)
- : "";
- return this.name + message;
+ var message = hasMessage ? (": " + error.message) : "";
+ return error.name + message;
} finally {
visited_errors.length = visited_errors.length - 1;
}
function isCyclicErrorMarker(o) { return o === cyclic_error_marker; }
try {
- return %_CallFunction(this, errorToStringDetectCycle);
+ return errorToStringDetectCycle(this);
} catch(e) {
// If this error message was encountered already return the empty
// string for it instead of recursively formatting it.
projects / platform / upstream / v8.git / commitdiff